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The electric field intensity between two parallel plates separated by 25mm is 8000 N/C. How much work is done by the electric field in moving a -2uC charge from the negative plate to the positive plate? What is the work done by the field in moving the same charge back to the positive plate? (The textbook answer is +4.00 x 10^-4J and -4.00 x 10^-4

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